ENH: Separate VS flag table type

Move the cmVS7FlagTable type out of the VS generators and rename it to
cmIDEFlagTable.  It will be useful for other generators.

Source/cmVisualStudioGeneratorOptions.h

@@ -18,33 +18,12 @@
 #define cmVisualStudioGeneratorOptions_h
 
 #include "cmLocalGenerator.h"
+
+#include "cmIDEFlagTable.h"
+typedef cmIDEFlagTable cmVS7FlagTable;
+
 class cmVisualStudio10TargetGenerator;
 
-// This is a table mapping XML tag IDE names to command line options
-struct cmVS7FlagTable
-{
-  const char* IDEName;  // name used in the IDE xml file
-  const char* commandFlag; // command line flag
-  const char* comment;     // comment
-  const char* value; // string value
-  unsigned int special; // flags for special handling requests
-  enum
-  {
-    UserValue    = (1<<0), // flag contains a user-specified value
-    UserIgnored  = (1<<1), // ignore any user value
-    UserRequired = (1<<2), // match only when user value is non-empty
-    Continue     = (1<<3), // continue looking for matching entries
-    SemicolonAppendable = (1<<4), // a flag that if specified multiple times
-                                  // should have its value appended to the
-                                  // old value with semicolons (e.g.
-                                  // /NODEFAULTLIB: => 
-                                  // IgnoreDefaultLibraryNames)
-
-    UserValueIgnored  = UserValue | UserIgnored,
-    UserValueRequired = UserValue | UserRequired
-  };
-};
-
 //----------------------------------------------------------------------------
 class cmVisualStudioGeneratorOptions
 {